VF
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válasza
1 hónapja
a)
`7 / 3 : (4 / 3 - 2 / 5) = 7 / 3 : (20 / 15 - 6 / 15) = 7 / 3 : (20 - 6) / 15 = color(green)cancel(color(black)7)^color(green)1 / color(blue)cancel(color(black)3)^color(blue)1 * color(blue)cancel(color(black)15)^color(blue)5 / color(green)cancel(color(black)14)^color(green)2 = 5 / 2 = color(red)(2 1 / 2)`
b)
`4 / 5 : (4 / 5 - 2 / 3) = 4 / 5 : (12 / 15 - 10 / 15) = 4 / 5 : (12 - 10) / 15 = color(green)cancel(color(black)4)^color(green)2 / color(blue)cancel(color(black)5)^color(blue)1 * color(blue)cancel(color(black)15)^color(blue)3 / color(green)cancel(color(black)2)^color(green)1 = color(red)6`
c)
`(2.4 - 1 / 5) : 22 / 15 = (24 / 10 - 2 / 10) : 22 / 15 = (24 - 2) / 10 : 22 / 15 = color(green)cancel(color(black)22)^color(green)1 / color(blue)cancel(color(black)10)^color(blue)2 * color(blue)cancel(color(black)15)^color(blue)3 / color(green)cancel(color(black)22)^color(green)1 = 3 / 2 = color(red)(1 1 / 2)`
d)
`2.4 - 1 / 5 : 22 / 15 = 24 / 10 - 1 / color(green)cancel(color(black)5)^color(green)1 * color(green)cancel(color(black)15)^color(green)3 / 22 = 264 / 110 - 15 / 110 = (264 - 15) / 110 = 249 / 110 = color(red)(2 29 / 110)`
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